numademo: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/numademo - from package: numactl

You may install the required package with command yum install {package}

Error in other languages:
numademo: bevel nie gevind nie
numademo: comandă negăsită
numademo: comando não encontrado
numademo: commande introuvable
numademo: command not found
numademo: käsku ei ole
numademo: không tìm thấy lệnh
numademo: komanda nerasta
numademo: Kommando nicht gefunden.
numademo: kommandot finns inte
numademo: komut yok
numademo: nie znaleziono polecenia
numademo: níor aimsíodh an t-ordú
numademo: no se encontró la orden
numademo: no s'ha trobat l'ordre
numademo: opdracht niet gevonden
numademo: parancs nem található
numademo: perintah tidak ditemukan
numademo: príkaz nenájdený
numademo: příkaz nenalezen
numademo: команда не найдена
numademo: командата не е открита
numademo: 命令找不到
numademo: コマンドが見つかりません